Automatic lathe



Nov. 2l, 1950 G. E. cuTTAT 2,530,813

AUTOMATIC LATI-1E Filed Dec. 28, 1946 2 Sheets-Sheet 1 A TTOHNEY NOV- 21, 1950 G. E. cuTTAT 2,530,813

AUTOMATIC LATHE Filed Dec. 28, 1946 2 Sheets-Sheet 2 Patented Nov. 21, 1950 AUTOMATIC LATHE Georges Emile Cuttat, Geneva, Switzerland, assigner to Manufacture de Machines du Haut- Rhin, Haut-Rhin, France, a company of France Application December 28, 1946, Serial No. 719,087 In France November 22, 1941 Section 1, Public Law 690, August 8, 1946 Patent expires November v22,- 1961 The present invention is relative to automatic lathes with a single spindle, comprising an auX- iliary driving shaft and a turret.

In some of the known machines,the longitudinal motion of the carriages is determined by a shaft element transversal to the lathe and the transverse motion of a carriage is determined by a longitudinal shaft element geared with the transverse shaft element. The lathe covered by the present invention is characterized by the fact that the transverse shaft element also controls the longitudinal displacements of the turret.

In these automatic lathes, the control rack of one of the carriages with a longitudinal displacement can slide within the support-guide of the turret carriage.

One type of embodiment of an automatic lathe according to the present invention is described hereunder, by way of example, and represented on the appended drawings in which:

Figure l is a longitudinal elevation, partly in section, of the lathe.

Figure 2 is an end view, also partly in section;

Figures 3 and 4 are variants thereof.

In these figures, only the parts of the lathe necessary for the understanding of the invention have been represented.

It will be seen that the main shaft is constituted by two elements, I and I', perpendicular to each other; element I being transverse, and element I longitudinal with respect to the lathe. On element I is mounted a cam, 2, acting, through bell crank lever 3, pivoted at 4 and provided with toothed sector 5, on a rack 6, associated with slide block l, carrying turret 8.

On shaft element I, another cam 9 has been mounted, acting, through a bell crank lever II, provided with a toothed sector I2 and pivoted about shaft I3, mounted in the frame of the machine, on a rack I 4, sliding within support I5, acting as a guide for turret carriage 'I. Rack I4 acts on carriage I6 sliding itself inside a guide 29. Longitudinal carriage I6 oliers a slide for transverse carriage II on which acts the end of lever I8, controlled itself by a cam keyed on main shaft element I'.

The control of a longitudinal carriage, on the other side of the lathe can be designed as follows:

On shaft element I is keyed yet another cam I9, acting on a lever 2 I, keyed itself on shaft I 3. On this shaft I3 is keyed another lever provided with a toothed sector, gearing with a rack I4', acting on a longitudinal carriage I6', inside which slides the transverse carriage I1', on which acts lever 2 Claims. (Cl. 29-52) 2 I 8, pivoted at I9', and subjected to the action of a cam 2|', keyed on shaft element I.

The carriages can be subjected, in a known manner, to the action of opposing springs pulling them backwards, so that there is always a contact between the levers and the cam proles. It will be seen that the control devices for the longitudinal translations of the carriages have been realised in such a maner that they can be adapted to automatic lathes without impairing the control of the other organs.

It Will be noted, besides, that the arrangement of the cams, placed one after the other, is such that they can be assembled and disassembled, and, therefore, very easily replaced.

In the variant represented in Figures 3 and 4, all the control levers have been located on the same shaft; except for that the system is exactly the same and similar parts are designated by the same reference numbers as in Figures 1 and 2. Only a few of these references have been indicated.

An automatic lathe equipped according to the present invention allows the manufacture of a large number of parts which are diicult to manufacture simply with turret tools.

l. In a single spindled automatic lathe with a turret, a frame, a first shaft element mounted in said frame transversely with respect to the lathe, a second shaft element mounted in said frame longitudinally with respect to the lathe, an angular gearing rotatably connecting said rst shaft element and said second shaft element, a support xed to said frame having a slot and bore therethrough and a longitudinal guide thereon, a turret carriage movable along said guide, a longitudinal rack fixed to said turret carriage, a toothed member the teeth of which mesh with said rack, said toothed member moving partly in said slot of said support and oscillatably mounted with respect to said frame, means carried by said first shaft element for imparting movement to said oscillatable member, a carriage having longitudinal and transverse movements with relation to said lathe, a guide xed to said frame for guiding said carriage longitudinally with respect to the lathe, a rack sliding longitudinally in said bore and acting on said carriage, a second toothed member the teeth of which mesh with said rack and oscillatably mounted with respect to said frame, means carried by the iirst shaft element for imparting movement to said second oscillatahle member, means oscillatably mounted With respect to said frame for acting on said carriage,

and means carried by the second shaft for imparting movement to said third oscillatable member.

2. In a single spindled automatic lathe, with a turret, a'frame, afrSt-'shaft element mounted in said frame transversely with respect to the lathe, a second shaft element mounted in said frame longitudinally with respect to the lathe, angular gearing rotatably connecting said rst shaftv element and said second shaft element, a support xed to said frame having a slotfa'bore therethrough, and a longitudinal guide thereon, a turret carriage movable along said guide, a rack'xed to the turret carriage, a toothe'dfeleme'nt'theteeth of which mesh with said rack, said toothedelement moving partly in said slotofsaidsupport, and oscillatably mounted with respect Vto said frame, means carried by said rst shaft element for imparting movement to said oscillatable'm'ember, two carriages having transverse and longitudinal-lmovements`with :relation .to said frame, two parallel guides-:one 'on' each -sideof the lathe forguiding said carriages longitudinally-with'respect to theV lathe," two racks acting longitudinally onfsaid carriages, one of Whichsli'des in said bore, two further toothedfmemb'ers theiteeth of "which gear with said latter two racks, an auxiliary shaft rotatably mounted in the frame parallel to said rst shaft element, and carrying freely one of said toothed members and fixedly the other toothed'member, means carried by said v`lrst shaft element for imparting movements to said free toothed member and to said auxiliary shaft,

'means oscillatably mounted with respect to said i: frame for acting on one of said two carriages, and

means carried by the second shaft for imparting movementto said third oscillatable member.

GEORGES EMILE CUTTAT.

REFERENCES CITED `Thefollowing references are of record in the le of-thispatent:

UNITED STATES PATENTS 

